KSZ8864RMN Datasheet, PDF (1/112 Pages) Micrel Semiconductor – Integrated 4-Port 10/100 Managed Switch with Two MACs MII or RMII Interfaces

KSZ8864RMN
Integrated 4-Port 10/100 Managed Switch
with Two MACs MII or RMII Interfaces
Rev. 1.4
General Description
The KSZ8864RMN is a highly-integrated, Layer 2
managed 4-port switch with optimized design, plentiful
features and smallest package size. It is designed for
cost-sensitive 10/100Mbps 4-port switch systems with
on-chip termination, lowest-power consumption, and
small package to save system cost. It has 1.4Gbps high-
performance memory bandwidth, shared memory-based
switch fabric with full non-blocking configuration. It also
provides an extensive feature set such as the power
management, programmable rate limiting and priority
ratio, tag/port-based VLAN, packet filtering, quality of
service (QoS), four queue prioritization, management
interface, MIB counters. Port 3 and Port 4 support either
MII or RMII interfaces with SW3-MII/RMII and SW4-
MII/RMII (see Functional Diagram) for KSZ8864RMN
data interface.
Functional Diagram
The KSZ8864RMN provides multiple CPU control/data
interfaces to effectively address both current and
emerging fast Ethernet applications.
The KSZ8864RMN consists of 10/100 fast Ethernet
PHYs with patented and enhanced mixed-signal
technology, media access control (MAC) units, a high-
speed non-blocking switch fabric, a dedicated address
lookup engine, and an on-chip frame buffer memory.
The KSZ8864RMN contains four MACs and two PHYs.
The two PHYs support the 10/100Base-T/TX.
All registers of MACs and PHYs units can be managed
by the control interface of SPI or the SMI. MIIM registers
of the PHYs can be accessed through the MDC/MDIO
interface. EEPROM can set all control registers by I²C
controller interface for the unmanaged mode.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
September 2011
M9999-092011-1.4